Hi, I've taken in two win 10 machines today with the same symptoms, failed spring update, recovery has two win 10 volumes and a rollback volume. No system restore points. The rollback just loops. The only solution I found was changing the default boot option to one of the win 10 volumes which came up to the user login but the account is totally hosed, can't even launch explorer from task manager, throwing up system errors. My solution was using fab's to backup the user data and do a reset then put everything back, but both had 100+ gigs of data to move around. Anybody found a better fix?